/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraConstants.h
static [TMap](API\Runtime\Core\Containers\TMap)< [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable), [FNiagaraVariableMetaData](API\Plugins\Niagara\FNiagaraVariableMetaData) > AttrMetaData;